Improvement in dampers



UNITED STATES PATENT OFFICE.

CHARLES C. F. STENDER, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN DAMPEFtS.

Speciiica Lion forming part of Letters Patent No. 41,869, dated March S, 1864.

To all whom it may concern: Y

Be it known that l, CHARLEsC. F. STEN- DER, ot Chicago, in the county of Cook, State of Illinois, have invented a new a-nd Improved Stove-Pipe Damper; and I do hereby vdeclare that the following is a full, clear, and exact description thereof, reference bei-n g had to the accompanying drawings, making a part ot' this speciCatiOn, in which- Figure 1 is a view of the improved damper arranged within a pipe, which is shownin section. Fig. 2 is a view of the open or slotted plates, seen by removing one of the cones. Fig.- 3 is a diametrical section, and Fig. 4 a side view of the improved damper.

Similar letters of reference indicate corresponding parts in the several gures.

'Ihe object of my invention is to obtain a stove-pipe damper or Valve by means of which the draft or the ascentof 4the products of combustion through the stovepipe can be completely controlled, and a great proportion of the heat which usually passes up the chimney radiated into the room.

The objection to the disk-valve which has hitherto been used in stove-pipes for regulating the dra-ft is that a large amount otl the heat escapes with the products of combustion, and this is particularly the case when the Valve or damper is entirely open. My object is to check the ascent of the smoke, and to combine with adamper operating in this manner the principles of the oscillating and the sliding dampers, all as will be hereinafter described.

To enable others skilled in `the art to make Iand use my invention, I will describe4 its con struction and operation In theaccompanying drawings, A'represents a circular plate, which is nearly equal `in diameter to the interior diameter of the stove pipe B, 'within which it is arranged, as shown in Figs. l and 4. This plate has a number of oblong slots cut through it, as shown in Figs. 2 and 3, a a c being the parallel slots, and a. a a the bars. Near the cir- Y cumference of the p'ate A, and diametrically opposite each other, are two staples, b b, which may be cast with plate A it' it be made of cast metal, and through these staplespasses looselyr the damperrod, which is considerably longer than the diameter ot' the stove-pipe B. To prevent the plate A from turningr around the rod C, that portion ot' this rod which passes through the staples b is made square, `so that by turning the rod C the plate A will turn with it. At the same time this rod will be allowed a free endwiseA play across the plate A.

D represents a plate, which is formed with slots c c c through ita-nf1 bars or closing-plates c c c, which latter are intended 1for closing or partially closing the s ted openings a a a through the plate A. Thi. atter plate` D, is of less diameter than the plateA, and an eye, d, is formed on it, which projects through the central slot of plate A and receives the rod C, to which the plate D is secured by a screw or pin, e, Fig. 3. The two plates, A and D, fit pretty cl'ose together, and when arranged in the stove-pipe B they will serve the double purpose ot' an oscillatingdisk valve or damper and also of a sliding valve or damper. By turning these plates so that they Will be in a plane with the axis of the stovepipe the products oi combustion will pass 'unobstructedly through the pipe, and .by turning the plates so as to close up the pipe, as shownl in Fig. l, the draft will be completely checked; but by sliding the plate D so as to leave openings through the two plates for the passage therethrough of the smoke, Sco., the dra t't may be regulated to a greater or less degree,

according to the extent of suoli openings.v

Thus it will be seen that although the two plates A and D are in the position shown in Fig. 1, a greater or less draft may be allowed by increasing or diminishing the extent of opening through the plate A, as above de-I scribed. y

When the plates A and D stand in the position shown in Figs. l (in red) and 4, there will be no occasion to use the plate D .but

vwhen these plates are across the pipe, as in Figl in black lines, the plate D can be moved, soas to give a very slight draft-opening,'according to the condition ot' the tire in l the stove.

lwo bearing-plates, g g, may be riveted to the pipe B, as shown in Fig. 4, for receiving the rounded portions of the rod C and supporting the damper within the stove-pipe..

G G represent two conical plates, the diameters of which are less than that of the plato A. These plates or cones'are both inverted and attached by their flanged bases means of the studs h h i i. 'may vary in height, or they may both be' of to the plate A, one above and the other be' low this plate, and separated therefrom by These two cones the same height, and they may be ofdiierent diameters at their bases; still they should not be of 4such a diameter as will prevent the passage of the smoke between their circumferential edges and the pipe B. The object of these cones G G is to check the heat arising with the smoke without obstructing the passage of the latter. The inclined or conical YVsurfaces of these plates GG receive the heat.

and radiate it toward the pipe B, or downward. as indicated by the red arrows in Fig.

l. Theiirst cone, G, which receives the heat,

may contain a larger amount of surface than the upper cone, which receives less heat than this lower or tirst cone. The heat rising with the smoke will, to a great extent, be absorbed `hy the first cone, G, and radiated in various directions toward the pipe B; then the heat Awhich escapes `past the tirst cone, G, and passes through the plates A D is received by and again radiated toward t-he pipe B, thus heating up the pipe below the damper and utilizing that heat which with the common forn ofdisk-valve would pass up the chimney.

The advantage of the sliding-damper plate in connection with these cones is that after the iire has become started and very little, if any, smoke escapes therefrom the sliding damper can be used to retard the passage of the heated gases, and thus rto allow-the cones to operate to a great advantage in radiating.

the heat 'andretaining it as much as possible below the damper until it is radiated into theI room. The heated air rising rapidly impin ges upon the conical surfaces, and is thrown oif laterally or at right angles to the direction it arrows 'in Fig. l.

Although I have described two cones, G G',

as being employed in my improved damper or v'alve, I do not desire to confine my invention to two such cones, as one only may be used, placedl either below the plates A D or above these plates. Instead of the conical shape represented in the drawings, a concavoconvex shape may be used.

The curved arm J, which is attached to one side of the plate A, as shown in Figs. 2 and 4, Ais intended to check the damper in its oscillating movement by coming in contact-with the pipe B when the damperis in the position shown in Fig. 4, and thus preventing the' damper from being turned completely around.

From this description it will be seen that' I have combined in a single damper all the advantagesof the solid plate valve and the heat. detlecting or radiating valve, and with this combination I introduce the sliding register for regulating the passage of the heated gases through the smoke-pipe, according to the condition of the re.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of one or more deiiectors G G with the sliding damper or register D and valve-plate A, substantially as and for the purpose described.

2. The combination of one or more deflectors G G with an oscillating valve, A,snbstan tially as and for theV purpose described.

CHARLES C. F. SVTENDE-R.'

Witnesses CHAs. H. BARNUM, D. HERBERT. 

